Lifting jack



' Na. 10, 1936. c, B, WOODWORTH 2,060,780-

LIFTING JACK Filed July 24, 19:55

- INVENTOR. fa CHI/9L :s 8. Wagon "r0.

.9 V I I I/"UATTORNEY.

Patented Nov 10, 1936 UNITED STATES PATENT OFFICE IJFTING JACK CharlesB. Woodworth, Port Dickinson, N. 'Y.

Application July 24, 1935, Serial No. 82,930

designed to raise automobile wheels above the ground or other supportfor changing tires, by ii engagement with the bumper bar or the likevcarried by the body of the car.-

7 Withthe'present' design of automobile body construction, withoverhanging fenders, etc.. it has become increasingly difficult to usethe conventicnal and ordinary type of lifting jack de-- signed to engagebeneath the axle of the wheels to lift the same for changing a tire.Likewise on automobiles provided with individual wheel suspension it isdifllcult to use the old type Jack for this purpose.

l v I have designed a lifting ja'ck which maybe.

readily engaged with the bumper bar of the car bending the bar duringthe lifting and supporting operation. f

A further object lies in the provision of a pivoted handle for the jackscrew by means of which the same may be readily folded down alongsidethe screw out of the way or raised to any desired angular position forconvenience in turning, and

. by means of which pivoted handle rotation of the screw may beaccomplished without interference with the radiator, headlights,fenders,. or other part of the car body.

-.Still another object lies in the provision of a protective frictionhandle piece or hand grip.

Other objects and advantages will be apparent, as thedescriptionproceeds, reference now being bad to the figures of theaccompanying drawing forming a part of this application and wherein likereference numerals indicate like parts.

In the drawing:

Figure 1 is a side view of a part of an automobile with my improvedlifting jack in position for operation.

Figure 2 is a side view of my i p lifting jack.

Figure 3 is a detail I of the jack, certain parts being in sectionalview of the base section and raised a suflicient distance above theground'tm.

gagement is provided and without danger of I certain parts being brokenaway for clearness of illustration.

Figure 4 is a detail sectional view of a portion of the jack screw andthe lifting member thereon.

Figure 5 is a detail view partly in section 11- 5 lustratlng thefrictional hand grip for the handle.

The reference numeral l refers to the supporting base of my improvedjack and which may .be of any desired size and shape; Centrally. thebase is provided with a semi-cylindrical conl0 cave seat 2 provided witha central opening 3 through which it is adapted to receive a pin 4provided with the head 5. The pin 4 is fixed rigidly to the centralportion of a semi-spherical convex end 6 of a hollow socket 1 into whichis 5 adapted to project the lower end 8 of the screw rod ,9 threaded forthe greater part of its length as at ill. The screw rod 9 is providedwith a collar ll adapted to engage the upper end of the socket 1 andwithin the socket 'I. the end 8 of on the screw rod is provided with aspring ring or other. friction device I! adapted to frlctionally engagethe inner walls of the socket and prevent inadvertent displacement ofthe screw rod within the socket.

' 25 The opening 3 ln'tlie base-i is substantially larger than the pin 4whereby a substantial amount of rocking movement is made possiblebetween the convex socket end 6 and the concave portion 2 of the base I.This is to permit angular an adjustment of the screw rodas may bedesired or necessary in the use thereof and in addition.

renders the rotation of the socket in the base easy.

It will be understood, of course, that the screw rod 9 is removable fromthe socket l by simply as pulling the same therefrom against the tensionand resilience of the friction device it.

Threadably mounted upon the screw rod 9 and engaging the threads Illthereof is a lifting collar i3 internally threaded to receive thethreads Ill 40 of the screw rod and adapted for adjustmentlongitudinally of the screw rod either by holding the screw rodstationary and rotating the collar or by holding the collar stationaryand rotating the screw rod. The lifting collar i3 is provided at 45 *oneside with a hook shaped portion il adapted awedging action between thehook and bar and 55 thus preventing sliding action of the hook on thebar.

The sleeve I3 is provided above the hook I! with an elongated portion I!of a length substantially equal to the width of the bumper bar l5whereby the full broad face of the bumper bar engages thereagainst andthus provides support during the lifting operation for the screw rod andthus eliminating the danger of bending or distorting the same, due tothe load being on one side of the rod.

The upper end of the screw rod 9 is provided with a pivot pin l9 towhich is suitably pivotally secured the bifurcated end 20 of a handle 2|preferably formed of metal bent to channel shape though obviously thehandie may take other forms. The extreme end of the handle 2| isprovided with a hand grip 22 of rubber, leather composition or the like,which prevents the hand of the operator from slipping therefrom and alsoprovides a protective means against marring the finish of the automobilein case the handle inadvertently strikes the same.

The handle 2i by virtue of its pivotal connection with the upper end ofthe screw rod may be folded downwardly alongside the screw rod or liftedto any desired angle with respect to the screw rod and whereby suchscrew rod may be rotated to cause the sleeve it to move up or downthereon.

In operation the sleeve i3 is rotated on the screw rod to a positionJust below the bumper bar l5. The jack is then placed in proper positionwith respect to the bumper bar and the sleeve It held against rotationand the screw rod rotated until the hook I engages the bumper barwhereupon continued rotation of the screw rod causes the sleeve I3 tomove upwardly thereon lifting the bumper bar therewith until the body ofthe car and the wheel has been raised sufdciently above the ground orother support to permit changing the tire or wheel thereon.

Similarly rotation of the screw rod in the opposite direction lowers thebumper bar and wheel and the tire again engages the ground whereupon thejack may be removed, the handle folded downwardly and the same storedaway conveniently. If desired, the base i and socket 'i may be removedalso from the screw rod, as previously explained.

The rocking movement permitted for the screw rod 8 on the base Icompensates for any irregularities or unevenness of the surface uponwhich the jack is placed for the lifting operation.

Of course, changes may be made in details of construction andarrangement of parts without departing from the spirit and scope of myinvention. -I do not limit myself, therefore, to the exact form hereinshown and described other than by the appended claims.

I claim:

1. A lifting Jack comprising a screw rod and lifting member thereon, anda handle attached to the upper free end of said screw rod for rotatingthe same, said handle being pivoted for folding alongside the same andfor movement to selective positions to permit the handle to swing acrossthe top of the screw rod.

2. A lifting jack comprising a screw rod and lifting member thereon, anda handle attached to the upper free end of said screw rod for rotatingthe same, said handle being pivoted for folding alongside the same andfor movement to selective positions to permit the handle to swing acrossthe top of the screw rod, said handle being of channel form to permitfolding closely against said screw rod.

3. A lifting Jack comprising a screw rod and lifting member thereon, anda handle attached to the upper free end of said screw rod for rotatingthe same, said handle being pivoted for folding alongside the same andfor movement to selective positions to permit the handle to swing acrossthe top of the screw rod, said handlebeing of channel form topermit-folding closely against said screw rod, and having a frictionalprotective hand grip on the end thereof.

4. A lifting jack comprising a screw rod and handle for turning thesame, a lifting member thereon for adjustment longitudinally of said rodas the same is turned, a base for supporting said rod, and a ball-likeconnection between said rod and said base, said connection comprising asocket receiving the end of said rod and said socket having a roundedend loosely connected to a concave portion of said base, and a collar onsaid screw rod engaging the upper end of said socket.

CHARLES B. WOODWORTH.

